:root {
    --brand: #0d9488;
    --brand-dark: #0f766e;
    --brand-soft: #ccfbf1;
    --sidebar-bg: #0f172a;
    --sidebar-muted: #94a3b8;
    --body-bg: #f1f5f9;
    --card-radius: 14px;
}

* {
    font-family: "Segoe UI", "Tahoma", sans-serif;
}

body {
    background: var(--body-bg);
    color: #1e293b;
    margin: 0;
}

.layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset-inline-start: 0;
    top: 0;
    bottom: 0;
    z-index: 1040;
    transition: transform .25s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px;
    font-size: 1.15rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.sidebar-brand i {
    color: var(--brand);
    font-size: 1.5rem;
}

.sidebar-nav {
    padding: 14px 12px;
    flex: 1;
    overflow-y: auto;
}

.sidebar .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--sidebar-muted);
    padding: 11px 14px;
    border-radius: 10px;
    margin-bottom: 4px;
    font-size: .95rem;
    text-decoration: none;
    transition: all .15s ease;
}

.sidebar .nav-link:hover {
    background: rgba(255, 255, 255, .06);
    color: #fff;
}

.sidebar .nav-link.active {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 6px 16px rgba(13, 148, 136, .35);
}

.sidebar .nav-link i {
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid rgba(255, 255, 255, .08);
}

/* Content */
.content {
    flex: 1;
    margin-inline-start: 260px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    background: #fff;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, .08);
    position: sticky;
    top: 0;
    z-index: 1030;
}

.topbar-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
    flex: 1;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--brand-soft);
    color: var(--brand-dark);
    display: grid;
    place-items: center;
    font-weight: 700;
}

.main {
    padding: 24px;
    flex: 1;
}

.footer {
    padding: 14px 24px;
    color: #64748b;
    font-size: .85rem;
    border-top: 1px solid #e2e8f0;
    background: #fff;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--card-radius);
    box-shadow: 0 2px 10px rgba(15, 23, 42, .06);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid #eef2f7;
    font-weight: 600;
    border-radius: var(--card-radius) var(--card-radius) 0 0 !important;
    padding: 16px 20px;
}

.stat-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    height: 100%;
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-size: 1.4rem;
    background: var(--brand-soft);
    color: var(--brand-dark);
    flex-shrink: 0;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    color: #64748b;
    font-size: .88rem;
}

/* Tables */
.table {
    margin: 0;
    vertical-align: middle;
}

.table > thead th {
    background: #f8fafc;
    color: #475569;
    font-size: .85rem;
    font-weight: 600;
    text-transform: none;
    border-bottom: 1px solid #e2e8f0;
    white-space: nowrap;
    padding: 12px 14px;
}

.table > tbody td {
    padding: 12px 14px;
    font-size: .92rem;
    border-color: #f1f5f9;
}

.table-hover > tbody > tr:hover > * {
    background: #f8fafc;
}

.badge {
    font-weight: 600;
    padding: .42em .7em;
    border-radius: 8px;
}

.btn-brand {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}

.btn-brand:hover {
    background: var(--brand-dark);
    border-color: var(--brand-dark);
    color: #fff;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 .2rem rgba(13, 148, 136, .15);
}

.empty-state {
    padding: 48px 16px;
    text-align: center;
    color: #94a3b8;
}

.empty-state i {
    font-size: 2.4rem;
    display: block;
    margin-bottom: 10px;
}

/* Login */
.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #0f766e 100%);
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 18px;
    padding: 34px;
    box-shadow: 0 20px 50px rgba(2, 6, 23, .35);
}

.login-logo {
    width: 62px;
    height: 62px;
    border-radius: 18px;
    background: var(--brand-soft);
    color: var(--brand-dark);
    display: grid;
    place-items: center;
    font-size: 1.8rem;
    margin: 0 auto 14px;
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .content {
        margin-inline-start: 0;
    }

    .main {
        padding: 16px;
    }
}